MC34825EPR2 Freescale Semiconductor, MC34825EPR2 Datasheet - Page 20

• Manufacturer Part Number: MC34825EPR2
• Description: IC USB MINI UNIV CHARGING 20QFN
• Manufacturer: Freescale Semiconductor
• Type: USB Interface ICr

Specifications of MC34825EPR2

• Controller Type: USB Peripheral Controller
• Interface: Micro-USB
• Voltage - Supply: 2.7 V ~ 5.5 V
• Current - Supply: 100mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-UFQFN Exposed Pad
• Usb Version: 2.0
• No. Of Ports: 1
• Supply Voltage Range: 2.7V To 5.5V
• Operating Temperature Range: -40°C To +85°C
• No. Of Pins: 20
• Msl: MSL 3 - 168 Hours
• Peak Reflow Compatible (260 C): Yes
• Rohs Compliant: Yes
• Leaded Process Compatible: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ID pin and the ground is less than 1.90 kΩ. The ID_GND bit
in the Status register indicates whether the ID pin is shorted
Table 6. ADC Output vs. Resistor Values (Unit: kΩ)
charging the battery. The power supplies supported include
those that are user defined, and the ones defined in the
Battery Charging Specification, Revision 1.0, from the USB
Implementer’s Forum and the CEA-936-A USB Carkit
Specification, from the Consumer Electronics Association.
The five types of power supplies specified in the afore
mentioned two specification documents are listed in
offered to assist the identification of the power supply type.
The PSTI state machine checks the connection status
Table 7. Power Supply Type vs. Detection Result
20
34825
FUNCTIONAL DEVICE OPERATION
ACCESSORY IDENTIFICATION
Notes
00000
00001
00010
00011
00100
00101
00110
00111
1
2
3
4
5
ADC Result
When the ADC result is 00000, the resistance between the
The 34825 supports various standard power supplies for
The Power Supply Type Identification (PSTI) function is
1.
2.
Item #
If the ID resistance is below 1.90 kΩ (nominal value), the ADC result is set to 00000.
If the ID line is floating, the ADC result is set to 11111
VBUS_DET
R
2.604
3.208
4.014
4.820
ID
2.00
6.03
8.03
(1)
1
1
1
1
1
(kΩ)
DP/DM_SHORT
ADC Result
01000
01001
01010
01011
01100
01101
01110
01111
POWER SUPPLY TYPE IDENTIFICATION
0
0
1
1
1
R
Table
10.03
12.03
14.46
17.26
24.07
ID
20.5
28.7
34.0
(kΩ)
USB_CHG
7.
0
1
0
0
0
ADC Result
to ground or not. If the ID pin is shorted to ground with less
than 30 Ω of resistance, the ID_GND pin is set to “1”.
between the DP and the DM pins. The state machine starts
when the VBUS pin voltage rises above the VBUS detection
threshold, which is indicated with an VBUS_DET bit in the
status register. The state machine will find out if the DP and
DM pins are shorted, indicated with the DP/DM_SHORT bit,
or the connection has the characteristics of a USB charger,
indicated with the USB_CHG bit. Together with the ID
detection result, the power supply type can be determined.
The conditions for reaching the conclusion of the five
supported power supplies are listed in
10000
10001
10010
10011
10100
10101
10110
10111
ID_FLOAT
1
1
1
0
0
R
ID
40.2
49.9
64.9
80.6
102
121
150
200
(kΩ)
ADC Result
Analog Integrated Circuit Device Data
11111
11111
11111
10111
11011
ADC Result
11000
11001
11010
11011
11100
11101
11110
11111
Freescale Semiconductor
Carkit Charger Type 1
Carkit Charger Type 2
Table
Standard USB Port
Dedicated Charger
Accessory Type
USB Charger
7.
R
ID
1000
255
301
365
442
523
619
(2)
(kΩ)